feat: add d4r inference engines and Windows parity tooling

Add native K/M/RR inference engines, HIP kernels, replay and validation
harnesses, and Windows DLSS setup and runtime support. Include GPU
profiling tools, build and packaging scripts, platform integration
patches, and implementation documentation.

tools/windows/d3d12_command_hooks.h

@@ -0,0 +1,24 @@
+#pragma once
+#include "d3d12_external.h"
+#include <functional>
+#include <string>
+
+namespace d4r::win::commands {
+// Intercept only documented D3D12 COM methods on this device's runtime.
+// A boundary becomes prefix -> callback -> suffix at ExecuteCommandLists,
+// preserving preceding lists in the caller's batch and current-frame output.
+using Boundary = std::function<void(ID3D12CommandQueue*)>;
+void install(ID3D12Device* device);
+void record_boundary(ID3D12GraphicsCommandList* list, Boundary callback);
+std::string error();
+size_t live_recordings();
+D3D12_RESOURCE_STATES resource_state(ID3D12GraphicsCommandList* list, ID3D12Resource* resource, D3D12_RESOURCE_STATES fallback);
+ResourceAccess resource_access(ID3D12GraphicsCommandList* list, ID3D12Resource* resource, ResourceAccess fallback);
+ResourceAccess submitted_resource_access(ID3D12Resource* resource, ResourceAccess fallback);
+// Internal copies and callback submissions must bypass logical list routing.
+struct InternalScope {
+    bool previous;
+    InternalScope();
+    ~InternalScope();
+};
+}